Thanks so much, that's a great idea, I'll tell hubby about it.Vicki, if you hang something over the waterer so they can't hop onto the top of the water jug, you'd probably solve the problem. I had one hen who is high strung and she was hopping on top the waterer to perch above her "enemies". When the water level got low, she'd end up tipping the whole thing over.
I just took a square of netting, fashioned a sort of cone (like a dunce's cap) out of it, clipped it in that shape, then suspended it over the waterer which is near a fence that I could hang it from. It solved the problem neatly. Anything you could come up with to discourage them from utilizing the top of the waterer would probably keep the thing from ever tipping over again.